<template>
  <div class="child2">
    <h3>子组件2</h3>
		<h4>电脑: {{ computer }}</h4>
		<h4 v-show="toy">哥哥给的玩具: {{ toy }}</h4>
  </div>
</template>

<script setup lang="ts" name="Child2">
import { ref, onUnmounted} from "vue";
import emitter from "@/utils/emitter";
// 数据
let computer = ref('联想')
let toy = ref('')
// 给 emitter 绑定 send-toy 事件
emitter.on('send-toy', (value:any) => {
	toy.value = value
	console.log('send-toy', value)
})
// 在组件卸载时解绑 send-toy 事件
onUnmounted(()=> {
	emitter.off('send-toy')
})
</script>

<style scoped>
	.child2{
		margin-top: 50px;
		background-color: orange;
		padding: 10px;
		box-shadow: 0 0 10px black;
		border-radius: 10px;
	}
</style>